1. REVIEW OF
UNIT 4

2. NONCALCULATOR
PORTION OF
REVIEW

3. Match the polynomial function to the graph.
_____1. y = x2 + 5x
_____2. y = -x4+4x2
_____3. y = x4 – 4x2
_____4. y = -x4- 2x3 + 3
_____5. y = x3 + 2x2 – 5x
_____6. y = 5x – x3 F A D B C E B. A. C. D. E. F.

4. Use the graph at the bottom to answer the following questions.
______7. How many real zeros does the function have?
______8. What is the minimum degree of the function?
______9. Is the leading coefficient negative or positive? 4 4 +

5. 10. Given the graph of the function: f(x) = x3 – 2x2 – 9x – 2
Give exact answers for all real roots.
Observed zero: -2 -2 8 2 1 -4 -1
x2 – 4x – 1 = 0
Use quadratic formula:
Ans: -2,

6. _____________11. (5 + 2i) – (-2 + 4i)
Perform the indicated operation. Be sure to put your answers in proper form.
_____________11. (5 + 2i) – (-2 + 4i)
_____________12. (3 + i)(4 – 5i)
_____________13. (5i)(-2i)
_____________14.
_____________15. Simplify:
7 – 2i
17 – 11i 10
- 4i

7. Solve by factoring. Give exact answers to all real and imaginary solutions.
_______________16. x4 – 6x + 5 = 0
_______________ x3 + 2x = 11x2
_______________18. f(x) = x4 - 16
1, -1,
2i, -2i, 2, -2
Solve the system of equation.
_______________19. y = x2 – 10
y = x + 2
(4, 6) (-3, -1)

8. CALCULATOR PORTION OF
REVIEW

9. Find all zeros, REAL and IMAGINARY. Give EXACT answers.
____________ 1. f(x) = - x3 – 3x2 – 7x – 10
____________ 2. f(x) = x4 – 8x3 + 7x2 + 72x – 144
____________ 3. f(x) = 2x3 – 5x2 + 3
Give REAL roots of the polynomial function to the nearest HUNDREDTH.
__________________4. x4 + x3 = 15x2 + 10x – 20
Solve the system of inequalities.
5. y > x2 – 4x – 5
y > 2x – 7 Answer:
-3, 4, 4, 3
-3.87, -1.6, .91, 3.56

10. Solve to the nearest hundredth.
___________________6.
___________________7.
(-2.58, -2.28)
(-1.63, .33)(1.63, .33)

11. STUDY HARD
AND
GOOD LUCK